No, you can't. Rendere takes a direct object. Gli is an indirect object pronoun so you can't use it. Le is either the 3rd person plural feminine direct object pronoun or the 3rd person singular feminine indirect object pronoun. So le can be used but the sentence would be:

To qualify my previous reply: rendere certainly does take an indirect object where it means to give something to someone but not in this case where its meaning is to make/render someone something, the something being an adjective rather than a noun object.

Ilvia
Per favore, correggete le mie frasi in inglese quando sono sbagliate :) Anche se si tratta di errori piccoli, non mi offenderò!!
Please, correct my English sentences when they are wrong :) Also if there are small errors, I will not take offence!!